vtopoclass(1Vi)vtopoclass(1Vi)NAME
vtopoclass - perform a topological classification
SYNOPSIS
vtopoclass [-option ...] [infile] [outfile]
DESCRIPTION
vtopoclass performs a topological classification on a binary input image and produce a labelled output image.
Typically, this program is applied to a skeletonized binary image. It will attribute a label to each foreground voxel, which characterizes
its topological type.
The input image must be of type bit. The output image will be of type ubyte.
Output codes are the following:
1: interior point
2: isolated point
3: border point
4: curve point
5: curves junction
6: surface point
7: surface/curve junction
8: surfaces junction
9: surfaces/curve junction
LIT :
G. Malandain, G. Bertrand, N. Ayache: "Topological Segmentation of discrete surfaces", Intern. Journal of Computer Vision, 10:2, pp.
183-197, 1993
COMMAND LINE OPTIONS
vtopoclass accepts the following options:
-help Prints a message describing options.
-in infile Specifies the Vista data file containing the input images.
-out outfile Specifies where to write the output images as a Vista data file.
Input and output files can be specified on the command line or allowed to default to the standard input and output streams.
SEE ALSO vthin3d(1Vi), VImage(3Vi), Vista(7Vi)AUTHOR
Gabriele Lohmann <lohmann@cns.mpg.de>
Vista Version 2.0 15 Februar 1994 vtopoclass(1Vi)
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vtopgm(1Vi)vtopgm(1Vi)NAME
vtopgm - convert image from Vista data file to portable graymap
SYNOPSIS
vtopgm [-option ...] [infile] [outfile]
DESCRIPTION
vtopgm converts one band of an image to a portable graymap (PGM) file. A wide range of filters are available to convert PGM files to other
formats.
This program only produces portable graymaps whose pixel values are in the range 0 to 255. Any type of Vista image is accepted, but the
image is first converted to have ubyte pixels if necessary. This conversion is performed by VConvertImageRange(3Vi).
COMMAND LINE OPTIONS
vtopgm accepts the following options:
-help Prints a message describing options.
-in infile Specifies a Vista data file containing the image to be converted. If the file contains more than one image, only the first
is used.
-out outfile Specifies the file to contain the portable graymap.
-band band Specifies the image band to be converted. Default: 0.
Input and output files can be specified on the command line or allowed to default to the standard input and output streams.
SEE ALSO pgm(5), VImage(3Vi), Vista(7Vi)AUTHOR
David Lowe <lowe@cs.ubc.ca>
Vista Version 1.12 24 April 1993 vtopgm(1Vi)
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